Verified Nov 2026
Metal Fabrication
·
Buffalo, New York
·
Since 1947
API Heat Transfer is a manufacturer of heat exchangers and thermal systems headquartered in Buffalo, New York, and founded in 1947. The company is estimated to have between 1,000 and 5,000 employees and revenue in the $50-100 million range, and it is privately held. Its products serve automotive, electric-vehicle, medical, military-defense, renewable-energy, and industrial-equipment customers. In May 2026 it reported opening a third plant in Suzhou, China, and it also launched the SIGMA M186 heat exchanger for large-scale data center cooling.
API Heat Transfer at a glance
Revenue
$50-100M
Est. band
Employees
1,000-5,000
Founded
1947
Headquarters
Buffalo, New York
Certifications
ISO 9001
Import activity
2928
Industries
Automotive
Electric Vehicles
Medical
Military & Defense
Renewable Energy
Industrial Equipment
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
2928
Named foreign suppliers
50
Top origins
China · Netherlands · Germany · Belgium
Shared foreign counterparties do not establish that these companies buy from API Heat Transfer.
What this tells a buyer
The company announced the opening of a new facility in Germantown, Wisconsin, in October 2026, according to its public job posting on LinkedIn.
The company holds ISO 9001 certification and offers forging, machining, welding, and sealing capabilities for its heat transfer products.
Caterpillar recognized API Heat Transfer with its 2026 Annual Supplier Excellence award, and Munters named it Engineering Partner of the Year in August 2026.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
STABILITY SIGNALS
Established & active
79 years in operation (founded 1947).
Holds ISO 9001 certification(s) per public sources.
Overview
API Heat Transfer is a manufacturer of heat exchangers and thermal systems headquartered in Buffalo, New York, and founded in 1947. The company is estimated to have between 1,000 and 5,000 employees and revenue in the $50-100 million range, and it is privately held. Its products serve automotive, electric-vehicle, medical, military-defense, renewable-energy, and industrial-equipment customers. In May 2026 it reported opening a third plant in Suzhou, China, and it also launched the SIGMA M186 heat exchanger for large-scale data center cooling.
At a glance
Attribute | Detail |
|---|---|
Founded | 1947 |
Headquarters | Buffalo, New York |
Employees | 1,000-5,000 |
Revenue | $50-100M (estimated) |
Primary capability | Metal Fabrication |
Certifications | ISO 9001 |
What API Heat Transfer makes
The company holds ISO 9001 certification and offers forging, machining, welding, and sealing capabilities for its heat transfer products.
Products and capabilities described on the company's own site include Forging, Machining, Welding, Seal (source: apiheattransfer.com).
Certifications
API Heat Transfer is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 9001 — apiheattransfer.com
Trade and customs footprint
The company announced the opening of a new facility in Germantown, Wisconsin, in October 2026, according to its public job posting on LinkedIn. US customs bill-of-lading records list 2928 inbound shipments across 50 foreign suppliers, with top origins including China · Netherlands · Germany · Belgium.
Latest developments
2026-10-02 — Lead Our New Germantown Facility. We are opening a new facility in Germantown, WI, and are looking for an Operations Manager to build a strong team and drive continued growth! | API Heat Transfer (linkedin.com)
2026-09-24 — API Heat Transfer Earns Caterpillar's 2026 Annual Supplier Excellence Recognition | API Heat Transfer (apiheattransfer.com)
2026-08-27 — API Heat Transfer Named Engineering Partner of the Year by Munters | API Heat Transfer (apiheattransfer.com)
2026-05-13 — A Century of API, A New Chapter: Suzhou's Third Plant Opens, Forging a New Milestone in China's Smart Manufacturing | API Heat Transfer (apiheattransfer.com)
2026-05-13 — API Heat Transfer Launches SIGMA M186 Heat Exchanger for Large-Scale Data Center Cooling | API Heat Transfer (apiheattransfer.com)
2026-03-24 — 🚀 Project Win Highlight: Three New Basco® Type ES Heat Exchangers Sold! | API Heat Transfer (linkedin.com)
Facilities
API Heat Transfer is headquartered in Buffalo, New York. Public sources also reference these locations:
China — apiheattransfer.com
Suzhou, China — apiheattransfer.com
Company details
Caterpillar recognized API Heat Transfer with its 2026 Annual Supplier Excellence award, and Munters named it Engineering Partner of the Year in August 2026. API Heat Transfer was founded in 1947, has an estimated 1,000-5,000 employees, and is headquartered in Buffalo, New York. On the LightSource stability read it is rated "Established & active": 79 years in operation (founded 1947). Holds ISO 9001 certification(s) per public sources.
Frequently asked questions
What does API Heat Transfer make?
API Heat Transfer is a manufacturer of heat exchangers and thermal systems headquartered in Buffalo, New York, and founded in 1947. The company is estimated to have between 1,000 and 5,000 employees and revenue in the $50-100 million range, and it is privately held. Its products serve automotive, electric-vehicle, medical, military-defense, renewable-energy, and industrial-equipment customers. In May 2026 it reported opening a third plant in Suzhou, China, and it also launched the SIGMA M186 heat exchanger for large-scale data center cooling.
Where is API Heat Transfer headquartered?
API Heat Transfer is headquartered in Buffalo, New York (2777 Walden Avenue, Buffalo, New York, 14225).
When was API Heat Transfer founded?
API Heat Transfer was founded in 1947.
How big is API Heat Transfer?
API Heat Transfer has an estimated 1,000-5,000 employees, with revenue in the $50-100M range (estimated).
What certifications does API Heat Transfer hold?
API Heat Transfer lists ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
Does API Heat Transfer import from overseas suppliers?
US customs bill-of-lading records show 2928 inbound shipments for API Heat Transfer, with top origins including China · Netherlands · Germany · Belgium.
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Last verified Nov 2026. Is this your company? Request a correction.
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